Evaluation of coat color inheritance and production performance for crossbreed from Chinese indigenous Chenghua pig crossbred with Berkshire

Li Yujing,Yuan Rong,Gong Zhengyin,Zou Qin,Wang Yifei,Tang Guoqing,Zhu Li,Li Xuewei,Jiang Yanzhi 아세아·태평양축산학회 2022 Animal Bioscience Vol.35 No.10

Objective: This work was to determine coat inheritance and evaluate production performance for crossbred pigs from Berkshire×Chenghua (BC) compared with Chinese indigenous Chenghua (CH) pigs. Methods: The coat color phenotypes were recorded for more than 16,000 pigs, and the genotypes of melanocortin 1 receptor (MCIR) gene were identified by sequencing. The reproductive performance of 927 crossbred BC F4 gilts and 320 purebred CH gilts was recorded. Sixty pigs of each breed were randomly selected at approximately 60 days of age to determine growth performance during fattening period, which lasted for 150 days for BC pigs and 240 days for CH pigs. At the end of the fattening period, 30 pigs of each breed were slaughtered to determine carcass composition and meat quality. Results: The coat color of BC pigs exhibits a “dominant black” hereditary pattern, and all piglets derived from boars or sows genotyped ED1ED1 homozygous for MC1R gene showed a uniform black coat phenotype. The BC F4 gilts displayed a good reproductive performance, showing a higher litter and tear size and were heavier at farrowing litter and at weaning litter than the CH gilts, but they reached puberty later than the CH gilts. BC F4 pigs exhibited improved growth and carcass characteristics with a higher average daily live weight gain, lower feed-to-gain ratio, and higher carcass lean meat rate than CH pigs. Like CH pigs, BC F4 pigs produced superior meat-quality characteristics, showing ideal pH and meat-color values, high intramuscular fat content and water-holding capacity, and acceptable musclefiber parameters. C18:1, C16:0, C18:0, and C18:2 were the main fatty acids in M. longissimus lumborum in the two breeds, and a remarkably high polyunsaturated/saturated fatty acid ratio of ~0.39 was observed in the BC F4 pigs. Conclusion: The BC F4 pigs exhibit a uniform black coat pattern and acceptable total production performance. Objective: This work was to determine coat inheritance and evaluate production performance for crossbred pigs from Berkshire×Chenghua (BC) compared with Chinese indigenous Chenghua (CH) pigs.Methods: The coat color phenotypes were recorded for more than 16,000 pigs, and the genotypes of melanocortin 1 receptor (MCIR) gene were identified by sequencing. The reproductive performance of 927 crossbred BC F4 gilts and 320 purebred CH gilts was recorded. Sixty pigs of each breed were randomly selected at approximately 60 days of age to determine growth performance during fattening period, which lasted for 150 days for BC pigs and 240 days for CH pigs. At the end of the fattening period, 30 pigs of each breed were slaughtered to determine carcass composition and meat quality.Results: The coat color of BC pigs exhibits a “dominant black” hereditary pattern, and all piglets derived from boars or sows genotyped E^D1E^D1 homozygous for MC1R gene showed a uniform black coat phenotype. The BC F4 gilts displayed a good reproductive performance, showing a higher litter and tear size and were heavier at farrowing litter and at weaning litter than the CH gilts, but they reached puberty later than the CH gilts. BC F4 pigs exhibited improved growth and carcass characteristics with a higher average daily live weight gain, lower feed-to-gain ratio, and higher carcass lean meat rate than CH pigs. Like CH pigs, BC F4 pigs produced superior meat-quality characteristics, showing ideal pH and meat-color values, high intramuscular fat content and water-holding capacity, and acceptable musclefiber parameters. C18:1, C16:0, C18:0, and C18:2 were the main fatty acids in M. longissimus lumborum in the two breeds, and a remarkably high polyunsaturated/saturated fatty acid ratio of ~0.39 was observed in the BC F4 pigs.Conclusion: The BC F4 pigs exhibit a uniform black coat pattern and acceptable total production performance.

C57BL/6 마우스에서 알코올성 간 독성에 대한 DSF의 효과

이윤식,Hai-Dan Yuan,최원형,유재영,Meihua Jiang,Yujing Mi,Han-Hong Xiu,박진희,박유신,강주섭 대한암예방학회 2008 Journal of cancer prevention Vol.13 No.3

The aim of this study was to investigate the effect of disulfiram (tetraethylthiuram disulfide, DSF) on the alcoholic liver diseases in mice. C57BL/6 mice were divided into five groups. Control (normal), ethanol treated, DSF treated, ethanol and DSF treated, DSF treated after ethanol treatment for 3 weeks. We evaluated mice body weight and liver weight. On 1 week, body weight was decreased in ethanol treated mice and the body weight gain was similar in all groups of mice after 2 week. With interests, the body weight was significantly increased after treatment of ethanol and DSF for 3 week. However, in the mice with the treatment of DSF only, there was no change of body weight gain and was similar with that of control group of mice. The liver weight of ethanol treated groups was significantly higher than the other groups. A level of ALT, AST and cholesterol in serum were increased in the ethanol treated mice and the level of cholesterol and LDH were increased in DSF treated mice. By H&E staining, we observed degenerative liver tissue change; periportal lymphocytic infiltration, hepatocytes necrosis, severe imflammatory cell infiltrations in ethanol group, and the liver damage was slightly recovered by the treatment of DSF. These results suggest that drinking ethanol is inducible mouse liver damage and the ethanol-induced liver damage was recovered by the treatment of DSF. (Cancer Prev Res 13, 222-227, 2008)

Autogenous Shrinkage and Crack Resistance of Carbon Nanotubes Reinforced Cement‑Based Materials

Yanming Liu,Tao Shi,Yujing Zhao,Yuan Gu,Zhifang Zhao,Jiabin Chen,Bingmiao Zheng,Shichong Shi 한국콘크리트학회 2020 International Journal of Concrete Structures and M Vol.14 No.5

Cracking caused by shrinkage deformation of cement-based materials at early age is a major problem leading to material failure in restrained conditions. Carbon nanotubes (CNTs) are incorporated into cement-based materials, and the autogenous shrinkage and crack resistance of the new composite materials obtained by linear shrinkage and ring tests are studied to solve the destruction of the materials caused by the shrinkage of cement-based materials. The results showed that addition of CNTs significantly inhibited the autogenous shrinkage of cement-based materials with maximum reduction rate above 40%. CNTs also significantly improved the cracking resistance of cement-based materials. The optimal effect was noticed at CNTs content of 0.1 wt%. The incorporation of CNTs not only inhibits the autogenous shrinkage of cement-based materials, but also inhibits the drying shrinkage of cement-based materials to some extent. Therefore, carbon nanotubes have the potential to solve the destruction of materials caused by shrinkage of cement-based materials.

Oil recovery performance of a modified HAPAM with lower hydrophobicity, higher molecular weight: A comparative study with conventional HAPAM, HPAM

MingChen Ding,Yugui Han,Yigang Liu,Yefei Wang,Yefei Wang,Yujing Yuan 한국공업화학회 2019 Journal of Industrial and Engineering Chemistry Vol.72 No.-

Adaptability in improving hydrophobically associating polyacrylamide (HAPAM)flooding by reducinghydrophobicity (to decrease retention) while increasing molecular weight (to ensure viscosity), wasresearched by the comparative study of an accordingly modified HAPAM (M-HAPAM), a conventionalHAPAM (C-HAPAM) and a classical hydrolyzed polyacrylamide (HPAM). Attention is paid to theirthickening ability, injectivity and propagation, retention, andfinally oil-displacing performance. Resultsshow that hydrophobicity reduction helps retention decrement and propagation enhancement of MHAPAM,making it outperform C-HAPAM with regard to injectivity, propagation, and oil recovery:however, HPAM works best at permeabilities of1 mm23 mm2, and M-HAPAM needs morehydrophobicity reduction.